Display apparatus, display device, and image projection method

By using the incident area and exit area of ​​the waveguide assembly in the display device, combined with the control of the liquid crystal layer and the electrode layer, the problem of low light energy utilization in the prior art is solved, and higher light energy utilization and eye-entry brightness are achieved, and users with different pupil distances are adapted to.

WO2025112479A1PCT designated stage expired Publication Date: 2025-06-05WUXI RUIQIN TECH CO LTD
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Patent Information

Application Number
PCT/CN2024/100454
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-12-01
Filing Date
2024-06-20
Publication Date
2025-06-05

AI Technical Summary

Technical Problem

Existing display devices equipped with augmented reality technology or virtual reality technology cannot adjust the transmission direction of light according to the pupil distance of different users and the direction of their eyes looking, resulting in a low light energy utilization rate.

Method used

A display device is provided, including a waveguide assembly, which has an incident area and an exit area. The incident area and an exit area are controlled by the liquid crystal layer and the electrode layer to change the transmission direction of the light beam, so that the light beam is transmitted in a total reflection form in the waveguide assembly, and dynamically adjust the exit area according to the user's pupil position.

Benefits of technology

The light energy utilization of the display device and the light beam's eye-entry brightness are improved, the loss during beam transmission is reduced, and more users with different pupil distances are adapted to.

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Abstract

A display apparatus, a display device, and an image projection method. The display apparatus comprises: a waveguide assembly; the waveguide assembly comprises an incident area (102) and an emergent area (103); the incident area (102) is used for changing the transmission direction of a light beam after the light beam is incident into the incident area (102), so that the light beam is transmitted in a total reflection form on the waveguide assembly; and the emergent area (103) is used for changing the transmission direction of the light beam transmitted to the emergent area (103) by means of total reflection, so that the light beam leaves the waveguide assembly and continues to propagate to the pupil of a user, wherein the light beam is a light beam containing display image information. The display apparatus is at least conducive to solving the problem of low light energy utilization rate.
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Citation Information

Patent Citations

  • Optical waveguide component and display method thereof, display device and display method thereof

    CN110146989A

  • Waveguide display with spatially switchable grating

    CN110494791A

  • Waveguide display two-dimensional pupil expansion method based on polarization holographic grating

    CN114236819A

  • Optical waveguide display device and display method

    CN114706227A

  • Display device, display apparatus, and image projection method

    CN117608089A